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Heliamphora Macdonaldae
''Heliamphora macdonaldae'' is a species of marsh pitcher plant endemic to Venezuela. It is closely related to '' H. tatei'' and was for a long time considered a form or variety of that species.McPherson, S. 2007. ''Pitcher Plants of the Americas''. The McDonald & Woodward Publishing Company, Blacksburg, Virginia. Putative natural hybrids between ''H. macdonaldae'' and ''H. tatei'' have been recorded in the southern part of Cerro Duida Cerro Duida, known as Yennamadi by the Ye'kuana, is a very large tepui in Amazonas state, Venezuela. It has an uneven and heavily inclined plateau, rising from highs of around in the north and east to a maximum of on its southwestern rim.Hub .... References Further reading * Gleason, H.A. (May 1931). Botanical results of the Tyler-Duida Expedition. ''Bulletin of the Torrey Botanical Club'' 58(5): 277–344. * Steyermark, J.A. ''et al.'' (18 May 1951)Sarraceniaceae p. 239–242InContributions to the flora of Venezuela. Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Gleason
Henry Allan Gleason (1882–1975) was an American ecologist, botanist, and taxonomist. He was known for his endorsement of the individualistic or open community concept of ecological succession, and his opposition to Frederic Clements's concept of the climax state of an ecosystem. His ideas were largely dismissed during his working life, leading him to move into plant taxonomy, but found favour late in the twentieth century. Life and work Gleason was born in Dalton City, Illinois, and after undergraduate and master's work at the University of Illinois earned a PhD from Columbia University in Biology in 1906. He held faculty positions at the University of Illinois, the University of Chicago and the University of Michigan, before returning to the East Coast, to the New York Botanical Garden in the Bronx, New York, where he remained for the rest of his career, until 1950. In Gleason's early ecological research on the vegetation of Illinois, around 1909–1912, he worked large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliamphora
The genus ''Heliamphora'' ( or ; Greek language, Greek: ''helos'' "marsh" and ''amphoreus'' "amphora") contains 24 species of pitcher plants endemism, endemic to South America.McPherson, S., A. Wistuba, A. Fleischmann & J. Nerz 2011. ''Sarraceniaceae of South America''. Redfern Natural History Productions, Poole. The species are collectively known as sun pitchers, based on the mistaken notion that the ''heli'' of ''Heliamphora'' is from the Greek ''helios'', meaning "sun". The name instead derives from the Greek ''helos'', meaning "marsh", so a more accurate translation of their scientific name would be marsh pitcher plants. Species in the genus ''Heliamphora'' are carnivorous plants that consist of a modified leaf form that is fused into a tubular shape. They have evolved mechanisms to attract, trap, and kill insects; and control the amount of water in the pitcher. At least one species (''Heliamphora tatei, H. tatei'') produces its own proteolysis, proteolytic enzymes that allo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It comprises an area of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas. The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. Venezuela is a presidential republic consisting of States of Venezuela, 23 states, the Venezuelan Capital District, Capital District and Federal Dependencies of Venezuela, federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of the north and in the capital. The territory o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliamphora Tatei
''Heliamphora tatei'' (after George Henry Hamilton Tate) is a species of marsh pitcher plant endemic to Cerro Duida, Cerro Huachamacari and Cerro Marahuaca in Venezuela. It is closely related to '' H. macdonaldae'', '' H. neblinae'', and '' H. parva'', and all three have in the past been considered forms or varieties of ''H. tatei''.McPherson, S., A. Wistuba, A. Fleischmann & J. Nerz (2011). ''Sarraceniaceae of South America''. Redfern Natural History Productions Ltd., Poole. Like ''H. tatei'', these species are noted for their stem-forming growth habit. Putative natural hybrids between ''H. macdonaldae'' and ''H. tatei'' have been recorded in the southern part of Cerro Duida.Rivadavia, F. (2008)Cerro Duida, Cerro Avispa, Cerro Aracamuni. CPUK Forum, 14 June 2008. Infraspecific taxa *''Heliamphora tatei'' var. ''macdonaldae'' (Gleason) Maguire (1978) H. macdonaldae''*''Heliamphora tatei'' f. ''macdonaldae'' (Gleason) Steyerm. (1984) Hel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Form (botany)
In botanical nomenclature, a ''form'' (''forma'', plural ''formae'') is one of the "secondary" taxonomic ranks, below that of variety, which in turn is below that of species; it is an infraspecific taxon. If more than three ranks are listed in describing a taxon, the "classification" is being specified, but only three parts make up the "name" of the taxon: a genus name, a specific epithet, and an infraspecific epithet. The abbreviation "f." or the full "forma" should be put before the infraspecific epithet to indicate the rank. It is not italicised. For example: * '' Acanthocalycium spiniflorum'' f. ''klimpelianum'' or ** ''Acanthocalycium spiniflorum'' forma ''klimpelianum'' (Weidlich & Werderm.) Donald * '' Crataegus aestivalis'' (Walter) Torr. & A.Gray var. ''cerasoides'' Sarg. f. ''luculenta'' Sarg. is a classification of a plant whose name is: ** ''Crataegus aestivalis'' (Walter) Torr. & A.Gray f. ''luculenta'' Sarg. A form usually designates a group with a noticeable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variety (botany)
In botanical nomenclature, variety (abbreviated var.; in ) is a taxonomic rank below that of species and subspecies, but above that of form. As such, it gets a three-part infraspecific name. It is sometimes recommended that the subspecies rank should be used to recognize geographic distinctiveness, whereas the variety rank is appropriate if the taxon is seen throughout the geographic range of the species. Example The pincushion cactus, ''Escobaria vivipara'', is a wide-ranging variable species occurring from Canada to Mexico, and found throughout New Mexico below about . Nine varieties have been described. Where the varieties of the pincushion cactus meet, they intergrade. The variety ''Escobaria vivipara'' var. ''arizonica'' is from Arizona, while ''Escobaria vivipara'' var. ''neo-mexicana'' is from New Mexico. Definitions The term is defined in different ways by different authors. However, the International Code of Nomenclature for Cultivated Plants, while recognizing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Hybrid
In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction. Generally, it means that each cell has genetic material from two different organisms, whereas an individual where some cells are derived from a different organism is called a chimera. Hybrids are not always intermediates between their parents such as in blending inheritance (a now discredited theory in modern genetics by particulate inheritance), but can show hybrid vigor, sometimes growing larger or taller than either parent. The concept of a hybrid is interpreted differently in animal and plant breeding, where there is interest in the individual parentage. In genetics, attention is focused on the numbers of chromosomes. In taxonomy, a key question is how closely related the parent species are. Species are reproductively isolated by strong barriers to hybridization, which include genetic and morphologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerro Duida
Cerro Duida, known as Yennamadi by the Ye'kuana, is a very large tepui in Amazonas state, Venezuela. It has an uneven and heavily inclined plateau, rising from highs of around in the north and east to a maximum of on its southwestern rim.Huber, O. (1995). Geographical and physical features. In: P.E. Berry, B.K. Holst & K. Yatskievych (eds.) '' Flora of the Venezuelan Guayana. Volume 1. Introduction.'' Missouri Botanical Garden Press, St. Louis. pp. 1–61. It has a summit area of and an estimated slope area of . At its foot lies the small settlement of La Esmeralda, from which the mountain can be climbed.Tate, G.H.H. & C.B. Hitchcock (January 1930). The Cerro Duida region of Venezuela. ''Geographical Review'' 20(1): 31–52. Cerro Duida shares a common base with the much smaller (but taller) Cerro Marahuaca, located off its northeastern flank, and together they form the Duida–Marahuaca Massif. Both tepuis are entirely within the bounds of Duida-Marahuaca National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Venezuela
The flora of Venezuela consists of a huge variety of unique plants; around 38% of the estimated 30,000 species of plants found in the country are endemic to Venezuela. Overall, around 48% of Venezuela's land is forested; this includes over 60% of the Venezuelan Amazon. These rainforests are increasingly endangered by mining and logging activities. Venezuela has a variety of biomes, including the Andes mountains in the west and the Amazon Basin rainforest in the south. Centrally located are the extensive Llanos lowland plains that host savannah forest. Also present is the Caribbean coast in the middle of the north, and the Orinoco River Delta in the east. They include xeric scrublands in the extreme northwest and coastal mangrove forests in the northeast. Its cloud forests and lowland rainforests are particularly rich, for example hosting over 25,000 species of orchids. These include the ''flor de mayo'' orchid (''Cattleya mossiae''), the national flower. Venezuela's national tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plants Described In 1931
Plants are the eukaryotes that form the kingdom Plantae; they are predominantly photosynthetic. This means that they obtain their energy from sunlight, using chloroplasts derived from endosymbiosis with cyanobacteria to produce sugars from carbon dioxide and water, using the green pigment chlorophyll. Exceptions are parasitic plants that have lost the genes for chlorophyll and photosynthesis, and obtain their energy from other plants or fungi. Most plants are multicellular, except for some green algae. Historically, as in Aristotle's biology, the plant kingdom encompassed all living things that were not animals, and included algae and fungi. Definitions have narrowed since then; current definitions exclude fungi and some of the algae. By the definition used in this article, plants form the clade Viridiplantae (green plants), which consists of the green algae and the embryophytes or land plants (hornworts, liverworts, mosses, lycophytes, ferns, conifers and other gymnosperm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
